Brexit was one big lie. As for how much Britain is paying to EU, the money that could be spent on medicine etc hahaha. What they forget to tell is how much they prospered due to being in the single market. I am a good example. I come from Slovenia, yet I order 95 % of goods from UK. Not from Germany, not from Italy or France, but UK. Why? No customs and better prices. And most of my friends do the same. And its not only Myprotein, Amazon.co.uk and Ebay.co.uk, far from it. Leave the EU and this stops immediately.
As for PMI, it is exactly as SIG said. I work for very big international company, a PG rival and I can tell you we are preparing for Brexit for 6 months already. Overstocking and producing like crazy. And other companies are doing the same. I heard UK is leaving out of storage capacities to store all those advance orders. So you can count on this number nosediving once those orders are being taken from warehouses instead of coming from factories..
Also just watch what is happening with auto industry. Japan and other plants are closing some plants and others will soon follow. UK will loose a lot of domiciles, some banks will move their seats out etc etc... I think Brexit is one big joke. But ok, lets wait and see who is better off.